NORDMENDE PRESIDENT 58 YEAR 1958.

This here today: NORDMENDE PRESIDENT 58

The NORDMENDE PRESIDENT 58 is a 20 (53Cm) inches B/W television with a big wooden cabinet.

It's first models series with a 90° degree CRT TUBE.

It has 22 tubes and 5 germanium diodes

It can receive only VHF channels with a selector but further was added an UHF tuner.

All commands are front for basic features.

It features tone control with 2 speakers Hi and Mid tone for 6 watts power out.

Tuning is obtained with rotatable drum selectors for VHF and variable rotatable capacitor for UHF.
A rotatable drum containing twelve pre-defined channel-specific filters determines the received channel, where the inductors of the input matching, the channel filter and the LO tank circuit are changed. The tuner is divided into two chambers for maximum isolation between the sensitive RF input and the mixer-oscillator-IF section with its much larger signals. Also on the drum there are eventually two separate sub-modules.
It's completely based on tubes technology.
With this concept, which essentially turned the tuner module into a kind of Lego building block construction, many different tuners became possible. Depending upon the country of destination and its associated standard and IF settings, the required filter modules would be selected. Service workshops and tv fabricants could later even add or exchange modules when new channels were introduced, since every inductor module had its individual factory code and could be ordered separately. As a consequence more versions of the tuner were produced, covering at least standards B, B-for-Italy, C. E, F and M.

The principle of the drum tuner. On an axis two times 12 regularly spaced channel-specific filter modules are mounted. In front are twelve channel filter modules for both the channel filter and LO tank circuit tuning. Seven contacts are available, and one module is shown removed. The second row contains 12 modules with five contacts for the input filter circuit. In the tuner module the front section (for mixer-ocillator and channel filter) is separated by a metal shield from the rear RF input and pre-amp section. [Philips Service "Documentatie voor de kanalenkiezers met spoelenwals", 1954]
Examples of the filter modules as used in the drum tuner. Left the 5-contact input filter, right the 7-contact BPF and LO tank filters. In both modules the coils are co-axial for (maximum) mutual coupling.

The second new valve introduced in the tuners family was the PCF80, a triode-pentode combo valve specifically designed for the VHF mixer-oscillator role. First order the circuit principles didn't change too much from the previous ECC81 based generation, with the triode acting as a Colpitts oscillator with a tuned feedback from anode to grid. The oscillator voltage was minimally 5V at the grid, and would be inductively coupled to the input of the mixer pentode. This inductive coupling was achieved by putting the oscillator coil S7 and the BPF coils S5 and S6 on the same rod inside the drum tuner filter modules, see Fig.5 above. By adjusting the distance between these coils for each channel filter module, the coupling constant could be kept more or less constant across all channels, providing as much as possible a frequency-independent mixer performance. For the mixer the pentode replaced the previous triode, providing more feedback isolation between anode and grid. All in all the new tuner must have given a considerable performance improvement compared to the previous generation.


Furthermore featuring picture levelling control with "film mode" "studio mode" or "bright mode".

Another feature was the capability to connect to a cable remote control even provided extra by NORDMENDE.

This set was mainly marketed in Germany were it's from.

It requires 180 Watts of power and his purchase price was in 1958 OVER 1050 DM.

Set kindly donated to me by Marshal Elia Z.

(To see the Internal Chassis Just click on Older Post Button on bottom page, that's simple !)



The B/W Tubes Television set was powered with a External Voltage stabiliser unit (portable metal box) which relates to voltage regulators of the type employed to supply alternating current and a constant voltage to a load circuit from a source in which the line voltage varies. Conventional AC-operated television receivers exhibit several undesirable performance attributes. For example, under low-line voltage conditions such as those encountered during peak load periods or temporary power brown-outs imposed during times of power shortage, picture shrinkage and defocusing are encountered and under extreme brown-out conditions the receiver loses synchronization with a resultant total loss of picture intelligibility.

On the other hand, abnormally high-line voltage conditions are sometimes encountered, and this can lead to excessive high voltage and X-ray generation. In addition, either abnormally high steady state line voltage conditions or high voltage transients such as those encountered during electrical storms or during power line switching operations may subject the active devices and other components of the receiver to over-voltage stresses which can lead to excessive component failure.

It is a principal object of the present invention to provide a new and improved AC-operated television receiver having greatly improved performance characteristics in the presence of fluctuating power supply voltages.

A more specific object of the invention is to provide an AC-operated television receiver affording substantially undegraded performance under even extremely low-line voltage conditions without excessive high voltage and X-ray generation under even extremely high-line voltage conditions.

Still another and extremely important object of the invention is to provide a new and improved AC-operated television receiver having greatly improved reliability against component failure. Such regulators are frequently provided employing saturable core reactors and condensers connected in circuit...  in such manner as to provide a plurality of variable voltage vectors which vary in different senses, as the line voltage varies, but which add vectorially in such manner that their vector sum remains substantially constant upon variations in line voltage, for providing automatic voltage stabilization of single or multiphase A. C. circuits where the supply voltage and frequency are subject to variation above and below normal value and where the load is subject to variation between normal limits

The voltage stabilization is automatically effected by the provision of an inductive pilot control device which is adapted to provide two excitation supply voltages for producing excitation or saturation of two magnetic circuits of a reversible booster transformer unit or units and diversion of flux from one magnetic circuit to the other, the booster unit being energized by primary windings from the A. C. supplysystem and being provided with a secondary winding or windings connected between the supply system and the corresponding inain or distribution circuit and in series therewith, through which a corrective boost voltage is
introduced into the circuit under the

influence of the pilot control device, of an amount equal to that of the supply voltage fluctuation which initiated it and appropriate in polarity and direction for restoring the voltage to normal value and providing automatic stabilization of the circuit voltage against supply voltages which fluctuate above and below normal value.


The pilot control device which may be employed singly or may comprise three units or their equivalent when applied to multiphase supply systems comprises a pair of closed magnetic circuits or cores constructed of strip wound magnetic material or stacked laminations, the two
circuits forming a pair being constructed of materials possessing dis~similar magnetic characteristics when jointly energized by identical windings in series or by a collective primary winding, the said magnetic circuits being suitably proportioned to provide equal fluxes when energized at normal voltage.

The pilot control device is
the auxiliary secondary winding embraces only one circuit, preferably that subject to the least amount of flux variation. Either of the windings consists of two equal sections or in effect a double winding with a center tapping to which one end of the single winding is connected.
provided with a main and an auxiliary secondary winding or group of windings, the main secondary winding or windings being adapted to provide a voltage representing the difference in the fluxes of the two circuits to which it is jointly associated, while

The voltage in the single secondary winding of the pilot device becomes directionally additive to that in one half of the tapped secondary winding and substractive in respect to that in the other half. When the supply voltage is normal the voltage provided by the single secondary winding is zero, since there is no difference of flux in the two magnetic circuits, and the two excitation voltages
produced in the halves of the other secondary winding are equal and when connected to the two excitation windings of the booster units, do not produce any diversion of flux between the two circuits or sets of circuits in the magnetic system of the booster transformer unit become equal, and since the series winding on the booster unit is arranged to provide a voltage due to the difference of
the fluxes in its two magnetic circuits or sets of magnetic circuits, no corrective voltage is introduced into the main circuit by the booster. If, however, the supply voltage varies from normal the pilot control device provides a voltage across the one secondary winding due to the difference in the fluxes of the two dis-similar magnetic circuits of which it is comprised, which voltage is combined with thosc in the halves of the other secondary winding to provide two excitation voltages which vary complementarily to each other as the supply voltage fluotuates, and cause a transference of flux between the two
circuits or groups of circuits in the booster unit and automatically provide a corrective boost voltage in the main circuit in which the series winding of the booster transformer is includcd of a value equal to that of the variation in supply voltage which initiated it.
The pilot device may be arranged in various ways, forboth single phase and multiphase operation, as exemplified by the constructions hereinafter more fully described.Similarly, numerous arrangements of the booster transformer unit are possible, some of which are hereinafter described in detail. The booster transformer unit embodies thc principles of the inductive devices described in my co-pending Application No. 411,189, filed February 18, 1954.

As an alternative to the provision of an auxiliary secondary winding on the pilot control device this may be
replaced by an independent or external source of supply,which may be either subject to or independent of supply voltage variation, provided such supply may be arranged with a center tapping if required.

Feed-back arrangements may be employed for providing compensation against voltage drop due to the effects of load in various ways. These are preferably providedon the booster transformer unit and may comprise a current transformer in one or more lines of the main circuit,
the secondary output of the transformer being rectified and arranged to energize an additional excitation winding on the booster transformer unit which in clfect increases the amount of the corrective boost voltage as the load increases.


Nordmende was a manufacturer of entertainment electronics based in Bremen, Germany.
The original company, Radio H. Mende & Co, was founded in 1923 by Otto Hermann Mende (1885-1940) in Dresden. Following the destruction of the plant during the bombing raids in 1945, Martin Mende (the founder's son) created a new company in Bremen in 1947, in a former Focke-Wulf plant, under the name North German Mende Broadcast GmbH. The name was subsequently changed to Nordmende: subsequently the company became one of the prominent German manufacturers of radios, televisions, tape recorders and record players in the 1950s and 1960s.

In the 1970s, Nordmende televisions were renowned for their innovative chassis, and for the rigorous testing and quality control of their finished products. Both created high costs, however, which soon proved a competitive disadvantage when the price of colour televisions began to plunge.

In 1969, Mende's sons took over the company, and in 1977 a majority shareholding was sold to the French Thomson Brandt company and the chassis remains the original NordMende until CHASSIS F9. The following year, the family sold their remaining shares to Thomson. In the 1980s, the factories in Bremen were closed, Nordmende becoming purely a Thomson trademark (Starting from chassis F10 F11 they're all THOMSON).








In the 1990s, the name Nordmende was used with decreasing frequency, and it eventually disappeared in favour of the Thomson name. In 2005 Videocon Group acquired all cathode ray tube activities from Thomson. This led to the creation of VDC Technologies, which manufactures TV sets using the Nordmende brand under licence from Thomson.
The Nordmende brand name was relaunched in Ireland in September 2008 by the KAL Group. Although Nordmende was well known for its televisions throughout Ireland during the 1970s and 1980s, the company bought the rights to the name and launched a range of white goods including fridges, freezers, washing machines, and dishwashers, alongside a revamped range of flat-screen TVs and stereos.

     
NORDMENDE HISTORY IN GERMAN:

Die Vorkriegsgeschichte findet sich unter Mende. Nach dem Totalverlust in Dresden gründet Martin Mende (30.12.1898-1982) unter Mitwirkung von Hermann Weber am 26. August 1947 [FT5901] in Bremen-Hemelingen die Norddeutsche Mende-Rundfunk GmbH.

Die ersten Gehäuse liefert ein Tischler in Achim gegen Kompensation von fünf Gehäusen zu einem Rundfunkgerät. Der frühere Mende-Konstrukteur, Obering. Heer zeichnet wieder für die Geräte verantwortlich [FT49??].

Ab 27. Juli 1948 liefert die neue, zuerst 18 und bald 60 Personen umfassende Firma auf Grund von Währungsreform, Krediten und Zulieferverträgen die neue Radioproduktion.

Das Regime in Ostdeutschland lässt den Namen Mende nicht zu, so dass Martin Mende mit grafischen Konstruktionen im Zusammenhang mit «Nord» an seinen Vorkriegserfolg anschliesst.

Die Hallen der ehemaligen Focke-Wulf AG beim Bahnhof Seebaldsbrück dienen als Werkstätten. 1950 beschäftigt das Unternehmen 700, 1959 schon 3500 und im Zenit 6300 Personen.

1950 beginnt die Firma mit UKW-, 1953 mit Fernseh- und 1954 mit Mess- und Prüfgeräten. Gegen Ende der 50er Jahre heisst die Firma Norddeutsche Mende Rundfunk KG [RP7901].

Nachdem sich Nordmende bislang nicht mit Magnettongeräten befasst hat, bringt das Werk 1958 das erste deutsche Heim-Tonbandgerät mit drei Motoren auf den Markt. Allerdings dominieren auf diesem Sektor eindeutig andere Firmen wie AEG/Telefunken und Grundig. Von Nordmende kommen jeweils nur ein bis zwei Geräte (1960 keines) in die Kataloge. Dafür hat die Firma Erfolg mit einem anderen Neueinstieg:


1958 stellt Nordmende mit «Mambo» ihr erstes Reisegerät vor - aber nicht «das erste deutsche, serienmässig hergestellte und volltransistorisierte Koffergerät», wie man aus einer Quelle nachlesen kann. Danach wird Nordmende in Deutschland auf dem Sektor Reisegeräte besonders stark, obwohl sie keine Röhren-Koffer baute. Immerhin kosten die in «Mambo» verwendeten 8 Halbleiter dann im Einzelhandel DM 98.70, während für die vier D-Röhren der 90er-Serie - auch zum Katalogpreis - etwa DM 35.- auszugeben wären. Preis des ganzen Gerätes: DM 189.- plus zwei Flachbatterien von 4,5 V.

Bis 1969 gibt es ca. 92 Modelle der tragbaren Radios (Koffer- bzw. «Handradios», d.h. «Hand held radios»). Beispielsweise finden sich im Katalog 1961/62 [448] je 11 Tischradios und Radiomöbel sowie 8 Modelle von Reiseradios. 17 verschiedene Fernsehmodelle zeigen dagegen, wo in jener Zeit der Erfolg zu holen war.

Gemäss [FT7901] liegt Nordmende während kurzer Zeit mit der sogenannten «Tippomatik-Bedienung» sogar technisch vorne. Siehe auch Philips etc.

Auch Konzertschränke scheinen Ende der 50er bis Anfang 60er Jahre eine tragende Säule für Nordmende zu sein. Dabei verwendet die Firma immer wieder gleiche Namen wie «Cabinet», «Caruso», «Casino», «Cosima» sowie «Arabella» und «Isobella» mit wechselnden Zusatz-Nummern oder den Zusatz «Stereo», z.B. in den Jahren 1959 und 1960/61.

Im März 1967 nimmt das Werk die Produktion von Farbfernsehgeräten auf. Zum Firmenjubiläum erscheint eine Gerätereihe mit der Bezeichnung 'Goldene 20'. 1969 übernehmen die Mende-Söhne Karl und Hermann die Geschäftsführung.

1977 führt der verschärfte Wettbewerb zum Verkauf der Mehrheit an den französischen Konzern Thomson-Brandt; die Familie Mende zieht sich anschliessend ganz aus dem Unternehmen zurück. Martin Mende stirbt 1982.

Weblinks:

 Commons: Nordmende – Sammlung von Bildern, Videos und Audiodateien
Tote Marke NORDMENDE – Verblasster Stolz. Artikel im Manager-Magazin
Ein neues Programm. Artikel in der Zeit
Fernseher: Inder produzieren neue Nordmende. Artikel bei itespresso.de
Videocon produziert Plasmaschirme für Nordmende. Artikel im pressetext.de

Einzelnachweise

Spectra Color Studio und Spectra SK2 Color de Luxe Studio auf radiomuseum.org
Marke Nordmende mit Digital- und Internetradios zurück, teltarif.de, Artikel vom 2. September 2017.


Company profile. Phillar, archiviert vom Original am 6. März 2008; abgerufen am 26. April 2013 (englisch).


Broschüre – Sprachmanager24. Abgerufen am 5. Januar 2015.

NORDMENDE PRESIDENT 58 CHASSIS 5792X INTERNAL VIEW.

The chassis 5792X of the NORDMENDE PRESIDENT 58 can be completely extracted from the cabinet toghether with the CRT TUBE to have a extreme service friendly development and construction state of the art !



It has 22 tubes and 5 germanium diodes featuring 35 functions to run the receiver.
It was an innovative chassis since introduces the use of the PC88 tube to obtain good noise to signal aspect ratios and further improvements with 2 diode for demod stage and more.

The sound output stage is realized with a PL84 to power up to 6 watts of sound in 2 ways.

Line deflection output stage have a PL36 TUBE (TELEFUNKEN)

The NORDMENDE CHASSIS 5792X is completely hand wired and it's divided in 2 main sections:

- Left side all signal circuits.

- Right side all deflection circuits and EHT.

The 2 sections are middle interconnected by wirings.

All circuits are completely TUBES based.




NOTE: The UHF TUNER was after time added on the chassis and it's not a part of the original which is only VHF CHANNELS RECEIVER CAPABLE.

NORDMENDE PRESIDENT 58 CRT TUBE VALVO (PHILIPS) AW53-80

NORDMENDE PRESIDENT 58 CRT TUBE VALVO (PHILIPS) AW53-80.

Valvo Bauelemente GmbH is a Germany based company, specializing in the delevopment, manufacture and marketing of ferrite components for microwave and rf applications. Initially part of the Philips Components group this business has 30 years experience in the design and production of standard and special ferrite devices.

When Philips closed its activity located in Hamburg, Valvo Bauelemente GmbH continues this circulator and isolator business and started 1999 as an independent company, only 100 meters off the former Philips location.

AT ancient times VALVO was an components office of PHILIPS then the converted to the above company was started and the previous closed.

The Valvo GmbH celebrates on 1 1974 April its 50th anniversary. She is one of the largest component manufacturers in Germany and today supplies - with few exceptions - all electronic components for the consumer electronics and professional electronics.

The company's history began in 1924 - a year after the introduction of broadcasting in Germany - with the establishment of a radio ray tube factory by the Hamburg company CHF Müller. Benedictines built many companies that produced radio tubes and the brand "Valvo" one of the few that are pervasive in the long run. 1927 joined CHF Müller and radio tube factory with Philips companies, and the tube manufacturing was relocated to a suitable site in Hamburg-Lokstedt. Already in the 30s advanced to the manufacturing program to electrolytic capacitors, speakers, and special tubes Hochohmwiderstände.

The Development of the present comprehensive Valvo organization began after the war. In Hamburg-Lokstedt bigger and modern factory buildings for the manufacture of electron tubes were built in Hamburg-Stellingen began with the manufacture of ceramic capacitors, which was then developed into a long horn on, and in Herborn founded Philips is later taken over by Valvo work for Electrolyte and plastic film capacitors.

Valvo 1951, the production of ceramic magnetic components. The set up for this new manufacturing plant in Hamburg was already the largest of its kind in Germany. With the broadcast of the first experimental television broadcasts Began in 1951, the manufacture of television picture tubes. From these first attempts gave rise to the Bildröhrenfabrik Aachen, which is now the largest color picture tube plant in Europe. 1953 with the introduction of semiconductor technology in Hamburg-Lokstedt a key step in a new era has been done. From the radio tube factory, the tubes and semiconductor plants.

The sales departments have since 1955, a private office building in Hamburg, Valvo-house. They are supported by six branch offices in the care of professional clients. In addition, sales contracts are entered into with 13 distributors.

To Valvo organization in which more than 8000 employees, which are now the four works: the tubes and semiconductor plants in Hamburg, the Hamburg factory for electronic components, the Bildröhrenfabrik Aachen and the capacitors work Herborn. These large manufacturing plants pose a significant production potential; its importance is enhanced by cooperation with 120 components factories in 30 countries as part of the Philips company, including the Valvo GmbH is a subsidiary of the General Association of German Industry Philips (Alldephi).

Valvo has done in its 50-year history many contributions to the development of electronic engineering in Germany. In the radio tube factory in Hamburg, including the first Acid-tubes, the first German multigrid tubes as well as the first tube types for ac heater was manufactured in series. In the picture tube technique with the rectangular tube in standardized aspect ratio, of the 110 ° deflection and the picture tube, which can be operated without additional protective glazing, remarkable improvements have been introduced. Today, the partnership offered by Valvo "European television technology", under which one understands the euro color picture tubes and Ablenktechnik with strand wound saddle coils enforced. The latest development is the picture tube with Schnellheizkatoden. From the large number of special tube developments here only Hochleistungsklystron should be mentioned that works in many of the UHF television channels at home and abroad.

Also for semiconductors Valvo could play a key role early on. For example, in 1954, brought out types OC 70, OC 71 were first available in large quantities alloyed junction transistors on the German market, and the diffusionslegierten POB transistors (pushed out base) extended from 1959 the scope of the transistor in the FM area. A striking example of the successes of modern semiconductor technology, the close tolerance varicap BB 105, with which the automatic tuning for FM and TV reception could be solved economically justifiable.

1967 originated in Hamburg analog integrated circuits. They were among the first of such products manufactured in Europe. Today Valvo has a leading position in the field of integrated circuits for color televisions. The second generation of these circuits is already matured. It contributes significantly to the reduction of the number of individual components and the necessary adjustment processes. Also numerous radio receiver as part of a progressive circuit design, advanced integrated circuits are available.

On the development of soft and hard magnetic oxide ceramic materials has been working steadily in recent decades, for example, would be the 110 °-Ablenktechnik without the high magnetic quality and dimensional accuracy of modern yoke rings from "Ferroxcube 3C2" not have been possible. For line transformers and modern power transformer, the new material "Ferroxcube 3C8" was introduced, and in the area of ​​hard magnetic materials are "ferroxdure 380", "ferroxdure 260" and "ferroxdure 270" available.

On this basis, the broad technical Valvo GmbH presents its 50th anniversary as one of the leading suppliers of electronic equipment industry with a large production capacity and with the most modern technical equipment - a solid foundation for the further development of the position it has reached today.

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Die Valvo GmbH begeht am 1. April 1974 ihr 50jähriges Firmenjubiläum. Sie ist einer der größten Bauelementehersteller in Deutschland und liefert heute - von wenigen Ausnahmen abgesehen - sämtliche elektronischen Bauelemente für die Konsumelektronik und die professionelle Elektronik.

Die Geschichte des Unternehmens begann 1924 - ein Jahr nach der Einführung des Rundfunks in Deutschland - mit der Gründung einer Radioröhrenfabrik durch die Hamburger Röntgenfirma C. H. F. Müller. Damals entstanden viele Firmen, die Radioröhren herstellten; die Marke "Valvo" gehört zu den wenigen, die sich auf die Dauer erfolgreich behaupten konnten. 1927 schlossen sich C. H. F. Müller und die Radioröhrenfabrik den Philips-Unternehmen an, und die Röhrenfertigung

wurde auf ein geeignetes Gelände in Hamburg-Lokstedt verlagert. Schon in den 30er Jahren erweiterte man das Fertigungsprogramm auf Elektrolytkondensatoren,Lautsprecher,Hochohmwiderstände und Spezialröhren.

Der Ausbau zur heutigen umfassenden Valvo-Organisation setzte nach dem Kriege ein. In Hamburg-Lokstedt wurden größere und moderne Fabrikgebäude für die Herstellung von Elektronenröhren errichtet, in Hamburg-Stellingen begann man mit der Fertigung von Keramik-Kondensatoren, die dann in Langenhorn weiter ausgebaut wurde, und in Herborn gründete Philips ein später von Valvo übernommenes Werk für Elektrolyt- und Kunststoffolien-Kondensatoren.

1951 nahm Valvo die Produktion keramischer magnetischer Bauteile auf. Das für diese Fertigung in Hamburg eingerichtete neue Werk war damals schon das größte seiner Art in der Bundesrepublik. Mit der Ausstrahlung der ersten Fernsehversuchssendungen

1951 begann auch die Herstellung von Fernsehbildröhren. Aus diesen ersten Ansätzen heraus entstand die Bildröhrenfabrik Aachen, die heute das größte Farbbildröhrenwerk Europas ist. 1953 wurde mit der Einführung der Halbleitertechnik in Hamburg-Lokstedt ein entscheidender Schritt in eine neue Ära getan. Aus der Radioröhrenfabrik wurden die Röhren und Halbleiterwerke.

Die Vertriebsabteilungen haben seit 1955 ein eigenes Bürogebäude in Hamburg, das Valvo-Haus. Sie werden von sechs Zweigbüros in der Betreuung der professionellen Kunden unterstützt. Außerdem sind Vertriebsverträge mit 13 Distributoren abgeschlossen.

Zur Valvo-Organisation, in der mehr als 8000 Mitarbeiter beschäftigt sind, gehören heute die vier Werke: die Röhren- und Halbleiterwerke Hamburg, das Werk für elektronische Bauelemente Hamburg, die Bildröhrenfabrik Aachen und das Kondensatorenwerk Herborn. Diese großen Fertigungsstätten stellen ein erhebliches Produktionspotential dar; seine Bedeutung wird noch durch die Zusammenarbeit mit 120 Bauelementefabriken in 30 Ländern im Rahmen der Philips Unternehmen gesteigert, zu denen auch die Valvo GmbH als Tochter der Allgemeinen Deutschen Philips Industrie (Alldephi) gehört.

Valvo hat in seiner 50jährigen Geschichte viele Beiträge zur Entwicklung der elektronischen Technik in Deutschland geleistet. In der Radioröhrenfabrik Hamburg wurden unter anderem die ersten Acid-Röhren, die ersten deutschen Mehrgitterröhren sowie die ersten Röhrentypen für Wechselstromheizung serienmäßig gefertigt. In der Bildröhrentechnik sind mit der Rechteckröhre im normgerechten Seitenverhältnis, der 110°-Ablenkung sowie der Bildröhre, die ohne zusätzliche Schutzscheibe betrieben werden kann, bemerkenswerte Verbesserungen eingeführt worden. Heute hat sich die von Valvo angebotene "Europäische Fernsehtechnik", unter der man die Eurocolor-Bildröhren und die Ablenktechnik mit stranggewickelten Sattelspulen versteht, durchgesetzt. Die neueste Entwicklung ist die Bildröhre mit Schnellheizkatoden. Aus der großen Anzahl der Spezialröhrenentwicklungen sei hier nur das Hochleistungsklystron erwähnt, das heute in vielen UHF-Fernsehsendern des In-und Auslandes arbeitet.

Auch zur Halbleitertechnik konnte Valvo schon frühzeitig Entscheidendes beitragen. Zum Beispiel waren die 1954 herausgebrachten Typen OC 70, OC 71 die ersten in großer Stückzahl erhältlichen legierten Flächentransistoren auf dem deutschen Markt, und die diffusionslegierten POB-Transistoren (pushed out base) erweiterten ab 1959 den Anwendungsbereich des Transistors in das UKW-Gebiet. Ein markantes Beispiel für die Erfolge der modernen Halbleitertechnik sind die engtolerierten Abstimmdioden BB 105, mit denen die automatische Abstimmung beim UKW- und Fernsehempfang wirtschaftlich vertretbar gelöst werden konnte.

1967 entstanden in Hamburg integrierte Analogschaltungen. Sie gehörten zu den ersten derartigen in Europa gefertigten Produkten. Heute hat Valvo eine führende Stellung auf dem Gebiet der integrierten Schaltungen für Farbfernsehgeräte. Die zweite Generation dieser Schaltungen ist bereits herangereift. Sie trägt wesentlich zur Verringerung der Anzahl der Einzel-Bauelemente und der erforderlichen Abgleichvorgänge bei. Auch für Rundfunkempfänger werden zahlreiche im Rahmen eines fortschrittlichen Schaltungskonzeptes entwickelte integrierte Schaltungen angeboten.

An der Weiterentwicklung von weich und hartmagnetischen oxidkeramischen Werkstoffen ist in den letzten Jahrzehnten kontinuierlich gearbeitet worden; zum Beispiel wäre die 110°-Ablenktechnik ohne die hohe magnetische Qualität und Maßhaltigkeit moderner Jochringe aus "Ferroxcube 3C2" nicht möglich gewesen. Für Zeilentransformatoren und moderne Leistungsübertrager wurde der neue Werkstoff "Ferroxcube 3C8" eingeführt, und auf dem Gebiet der hartmagnetischen Werkstoffe stehen "Ferroxdure 380", "Ferroxdure 260" und "Ferroxdure 270" zur Verfügung.

Auf dieser breiten technischen Basis präsentiert sich die Valvo GmbH zum 50jährigen Firmenjubiläum als einer der bedeutendsten Zulieferer der elektronischen Geräte-Industrie mit einer großen Produktionskapazität und mit modernster technischer Ausrüstung - ein solides Fundament für den weiteren Ausbau der heute erreichten Position.

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